* {
	margin: 0;
	offset: 0;
	padding: 0;
}
.login {
	background: transparent;
	font-size: large;
	width: 50;
	height: 100%;
	text-align: center;
	border-width: 0px;
	align-items: center;
	outline: none;
	color: white;
	display: flex;
	cursor: pointer;
	font-family: "arial rounded mt bold";
}
.top{
	opacity:0.9;
	display:flex;
	position:fixed;
	position:absolute;
	top:0;
	left:0px;
	width:100%;
	height:50px;
	background-color:#333333;
}
.topButton{
	display: flex;
	font-size: large;
	justify-content: center;
	margin: 0 5px;
	vertical-align: text-bottom;
	height:100%;
}
.loginput{
	display:block;
	background-color:#000000;
	position:fixed;
	position:absolute;
	width:100px;
	height:150px;
	top:50px;
	left:600px;
}
.input{
	display:block;
	position:absolute;
	width:80px;
	left:10px;
}
.logtext{
	position:absolute;
	display:block;
	left:15px;
	top:0px;
	color: #FFFFFF;
	font-family: "arial rounded mt bold";
}
#box{
	width: 100px;
	height: 300px;
	position:relative;
	zoom:1;
	border:none;
}
#box1{
	top:0px;
	position: relative;
	height:50px;
	text-align: center;
}
#box2{
	width:180px;
	height: 300px;
	position: absolute;
	left: -30px;
	top: 50px;
	display: none;
	z-index:9999;
	background-color:#333333;
	text-align: left;
}
.user_image{
	position: relative;
	width: 200px;
	height: 200px;
	background-image: url(../img/author.jpg);
	border-radius: 50%;
	background-repeat: no-repeat;
	background-size: cover;
	border: 5px solid #FFFFFF;
}
.authorinfo{
	position: relative;
	background-color: transparent;
	border: 5px solid #FFFFFF;
	border-radius: 10%;
	width:250px;
	height:150px;
	color: aliceblue;
	line-height: 22px;
}
#inner{
	width:600px;
	height: 200px;
	bottom: 90px;
	position: relative;
	overflow: hidden;
}
#inner img{
	width: 600px;
	height: 200px;
}
#inner ul {
	width: 100%;
	position: absolute;
	list-style: none;
	left:0px;
	top: 0px;
}
#inner li{
	float: left;
}
#arr{
	display:none;
}
#arr span{
	width: 40px;
	height: 40px;
	position: absolute;
	left: 0px;
	top: 50%;
	background: #fff;
	cursor: pointer;
	line-height: 40px;
	text-align: center;
	font-weight: bold;
	font-family: "arial rounded mt bold";
	font-size: 30px;
	color: #000;
	opacity: 0.5;
	border: 1px solid #fff;
}
#arr #right {
	right: 0px;
	left: auto;
}
.footer {
	height: 250px;
	line-height: 25px;
	position: relative;
	bottom: 0;
	width: 100%;
	text-align: center;
	background: #333;
	color: #ffffff;
	font-family: Arial;
	font-size: 14px;
	letter-spacing: 1px;
}

a{
	color: #F0F8FF;
	text-decoration: none;
}

.authorinfo_container{
	position: relative;
	display: flex;
	flex-wrap: wrap;
	flex: 1;
	top: 50px;
	text-align: center;
	justify-content: center;
	height: 450px;
	width: 300px;
	margin: 0 50px;
	font-family: "times new roman";
}
.authorinfo_back{
	left: 0px;
	top: 0px;
	width: 100%;
	height: 750px;
	background-repeat: no-repeat;
	background-color: #000000;
	background-image: url(../img/b1.jpg);
	z-index: -2;
	background-size: cover;
	background-position: 50% 100%;
}
/* 分类部分 */
.course-list{
	width: 100%;
	height: 1000px;
	display: flex;
	align-items: center;
	justify-content: center;
	background-color: #000000;
	background-image: url(../img/b2.jpg);
	background-size: cover;
	background-repeat: no-repeat;
	background-position: 50% 100%;
}
/*小图标*/
.social-btns .btn,
.social-btns .btn:before,
.social-btns .btn .fa {
	transition: all 0.35s;
	transition-timing-function: cubic-bezier(0.31, -0.105, 0.43, 1.59);
}
.social-btns .btn:before {
	top: 90%;
	left: -110%;
}
.social-btns .btn .fa {
	-webkit-transform: scale(0.8);
	transform: scale(0.8);
}
.social-btns .btn.wechat:before {
	background-color: #3b5998;
}
.social-btns .btn.wechat .fa {
	color: #3b5998;
}
.social-btns .btn.qq:before {
	background-color: #00aff0;
}
.social-btns .btn.qq .fa {
	color: #00aff0;
}
.social-btns .btn.weibo:before {
	background-color: #dc4a38;
}
.social-btns .btn.weibo .fa {
	color: #dc4a38;
}
.social-btns .btn:focus:before,
.social-btns .btn:hover:before {
	top: -10%;
	left: -10%;
}
.social-btns .btn:focus .fa,
.social-btns .btn:hover .fa {
	color: #fff;
	-webkit-transform: scale(1);
	transform: scale(1);
}
.social-btns {
	height: 90px;
	margin: 20px auto;
	font-size: 0;
	text-align: center;
}
.social-btns .btn {
	display: inline-block;
	background-color: #fff;
	width: 90px;
	height: 90px;
	line-height: 90px;
	margin: 0 10px;
	text-align: center;
	position: relative;
	overflow: hidden;
	border-radius: 28%;
	box-shadow: 0 5px 15px -5px rgba(0, 0, 0, 0.1);
	opacity: 0.99;
}
.social-btns .btn:before {
	content: "";
	width: 120%;
	height: 120%;
	position: absolute;
	-webkit-transform: rotate(45deg);
	transform: rotate(45deg);
}
.social-btns .btn .fa {
	font-size: 38px;
	vertical-align: middle;
}